package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
//@RestController是让类注入Spring boot容器，并实例化。
// 并让这个类中所有的api接口返回的数据，都以Json字符串返回客户端
//相当于RestController=controller+responsebody
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    //记住每个表现层都要有个业务层对象来调用方法
    @Autowired
    private EmployeeService employeeService;
    //@RequestMapping(value = "/user",method = RequestMethod.POST)
    //方便rest风格
    //员工登录
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request,@RequestBody Employee employee){

        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3、如果没有查询到则返回登录失败结果
        if(emp == null){
            return R.error("登录失败");
        }

        //4、密码比对，如果不一致则返回登录失败结果
        if(!emp.getPassword().equals(password)){
            return R.error("登录失败");
        }

        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if(emp.getStatus() == 0){
            return R.error("账号已禁用");
        }

        //6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清理Session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    //泛型是string是因为页面是靠code而没用到数据
    //新增员工使用了rest风格按请求方法不同来区分这是post
    @PostMapping
    public R<String> save(HttpServletRequest request ,@RequestBody Employee employee){
        //设置初始密码加密
        //String的getBytes()方法是得到一个操作系统默认的编码格式的字节数组
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //创建时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        //获得创建者的id
//        Long empId = (Long) request.getSession().getAttribute("employee");
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);
            employeeService.save(employee);

        return R.success("新增员工成功");
    }
    //泛型要看页面要上么数据
    //员工信息分页查询
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //添加查询调建
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询自动配置存数据了
        employeeService.page(pageInfo, queryWrapper);
        return R.success(pageInfo);
    }
    //根据id修改员工信息（通用）
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        Long empId = (Long) request.getSession().getAttribute("employee");
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        //js对long数据处理丢失精度导致传来的id不一致
        //方法让传来数据变成字符串
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }
    //获取请求路径里的id
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        Employee employee = employeeService.getById(id);
        if (employee !=null){
            return R.success(employee);
        }else {
            return R.error("查询不到相关员工信息");
        }

    }

}
